Answer:
A force is a push or pull on an object. Forces usually cannot be seen but their effects can.
Nothing moves, changes speed, stops or changes direction without force. Heavier objects need more
force to get them to move or change direction.
Explanation:
The acceleration due to gravity falls off as the inverse of the square of the distance from the center of the Earth. Thus the distance of interest is
1/(d/R)^2 = 0.785/9.8
d = R·√(9.8/0.785) ≈ R·3.53328
or R·2.53328 above the surface of the earth.
Wikipedia says the radius of the earth is 6371 km, so your distance is
(6371 km)·2.53328 ≈ 16,140 km
Answer:The poles
Explanation:
The field is strongest at the poles
Answer:
(A) 1/2 kA2 and 1/2 mv2 (max)
Explanation:
As we know that
1)In the SHM at mean position velocity become maximum and at the extreme position velocity become zero.
2)In the SHM at the mean position acceleration become zero and the extreme position it become maximum.
The total energy at the extreme position given as
A =Amplitude
K=Spring constant
The total energy at the mean position given as
m=mass
V==Velocity
Therefore the answer will be A.